How often are the proxies checked?

Proxies are typically checked every few hours.

This can vary a bit depending on how many open proxies are currently in the database; the more open proxies there are, the longer it takes the probe script to make a cycle.

Aside from the initial probes to determine whether or not a proxy is open, we do not check any proxy more often than once per hour.

We don't want proxy server owners consider us as spamers

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